Dosage schedule for montek fx
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Montek FX dosage schedule montelukast fexofenadine
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Here is the complete dosage schedule for Montek FX:
Montek FX (Montelukast 10 mg + Fexofenadine 120/180 mg)
Composition
- Montelukast 10 mg - leukotriene receptor antagonist
- Fexofenadine 120 mg or 180 mg - second-generation, non-sedating H1 antihistamine
Dosage Schedule
| Patient Group | Dose | Frequency | Timing |
|---|---|---|---|
| Adults & adolescents (≥12 yrs) | 1 tablet (Montelukast 10 mg + Fexofenadine 120/180 mg) | Once daily | Evening (preferably) |
| Children 6-11 yrs | Not recommended in this fixed-dose combination; individual components dosed separately | - | - |
| Children <6 yrs | Not recommended | - | - |
Key Dosing Instructions
- Timing: Best taken in the evening, typically 1 hour before bedtime. Montelukast is most effective when taken at night as it targets nocturnal symptoms.
- Food: Can be taken with or without food. However, avoid taking with fruit juices (grapefruit, orange, apple) as they can reduce fexofenadine absorption by up to 36%.
- Water: Swallow whole with plain water.
- Duration: As directed by the physician - typically continued through the allergy season or as part of a longer maintenance plan for chronic allergic rhinitis.
Indications
- Seasonal and perennial allergic rhinitis
- Chronic urticaria (off-label, but supported by evidence - Goldman-Cecil notes fexofenadine 60-180 mg/day with montelukast 10 mg/day for chronic idiopathic urticaria)
- Prurigo nodularis (adjunct use)
Special Populations
| Condition | Adjustment |
|---|---|
| Renal impairment | Fexofenadine: reduce to 60 mg once daily if severe renal impairment |
| Hepatic impairment | No dose adjustment needed for montelukast in mild-moderate impairment; use caution in severe |
| Elderly | Use with caution; start at lower end |
| Pregnancy | Use only if clearly needed; consult physician |
| Breastfeeding | Not recommended |
Important Notes
- Do not double-dose if a dose is missed - skip and resume the next evening.
- Montelukast has a black-box warning (FDA) regarding neuropsychiatric events (mood changes, depression, suicidal ideation) - monitor patients accordingly.
- Fexofenadine is non-sedating and generally well-tolerated; safe for daytime use.
Sources: Goldman-Cecil Medicine; Harrison's Principles of Internal Medicine 22E; prescribing information for individual components.
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